United Airlines flight UA 4459: Multiple routes

Select flight date:
FLIGHT SCHEDULE
Direct Flights:
Daily 05:00 Madison (MSN) 06:10 Chicago O'Hare (ORD) 2
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:10 Effective 2026-04-30 through 2026-05-20
Daily 09:45 Ottawa Macdonald-Cartier (YOW) 11:47 Washington Dulles (IAD)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 2:02 Valid until 2026-01-05
Daily 09:45 Ottawa Macdonald-Cartier (YOW) 11:27 Washington Dulles (IAD)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:42 Effective from 2026-10-25
Daily 10:08 Ottawa Macdonald-Cartier (YOW) 11:50 Washington Dulles (IAD)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:42 Effective 2026-05-21 through 2026-10-24
Mon-Fri,Sun 15:30 Newark Liberty, New York (EWR) C 17:06 Buffalo (BUF)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:36 Effective 2026-03-05 through 2026-03-27
Daily 16:05 Newark Liberty, New York (EWR) C 17:40 Buffalo (BUF)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-01-06 through 2026-02-11
Mon-Sat 16:15 Newark Liberty, New York (EWR) C 17:50 Buffalo (BUF)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:35 Effective 2026-02-12 through 2026-03-04
Daily 16:47 Newark Liberty, New York (EWR) C 18:14 Buffalo (BUF)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:27 Effective 2026-03-29 through 2026-04-29
Sat 17:45 Washington Dulles (IAD) 18:53 Pittsburgh (PIT)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:08 Operates only on 2026-03-07
Sat 17:55 Washington Dulles (IAD) 19:03 Pittsburgh (PIT)
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:08 Effective 2026-03-14 through 2026-03-28
Sun 18:49 Detroit (DTW) E 20:38 Newark Liberty, New York (EWR) C
UA 4459 Non-stop Canadair CRJ 550 (CR5) 1:49 Effective 2026-02-15 through 2026-03-01
This flight number is listed as serving the following routes:


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United Airlines flight UA 4459: Multiple routes
Select flight date:
FLIGHT SCHEDULE
Direct Flights:
United Airlines UA4459
05:00
Madison (MSN)

06:10
Chicago O'Hare (ORD) 2
Effective 2026-04-30 through 2026-05-20
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:10, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
09:45
Ottawa Macdonald-Cartier (YOW)

11:47
Washington Dulles (IAD)
Valid until 2026-01-05
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 2:02, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
09:45
Ottawa Macdonald-Cartier (YOW)

11:27
Washington Dulles (IAD)
Effective from 2026-10-25
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
10:08
Ottawa Macdonald-Cartier (YOW)

11:50
Washington Dulles (IAD)
Effective 2026-05-21 through 2026-10-24
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:42, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
15:30
Newark Liberty, New York (EWR) C

17:06
Buffalo (BUF)
Effective 2026-03-05 through 2026-03-27
Mon
Tue
Wed
Thu
Fri
Sat
-
Sun
Duration: 1:36, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
16:05
Newark Liberty, New York (EWR) C

17:40
Buffalo (BUF)
Effective 2026-01-06 through 2026-02-11
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
16:15
Newark Liberty, New York (EWR) C

17:50
Buffalo (BUF)
Effective 2026-02-12 through 2026-03-04
Mon
Tue
Wed
Thu
Fri
Sat
Sun
-
Duration: 1:35, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
16:47
Newark Liberty, New York (EWR) C

18:14
Buffalo (BUF)
Effective 2026-03-29 through 2026-04-29
Mon
Tue
Wed
Thu
Fri
Sat
Sun
Duration: 1:27, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
17:45
Washington Dulles (IAD)

18:53
Pittsburgh (PIT)
Operates only on 2026-03-07
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:08, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
17:55
Washington Dulles (IAD)

19:03
Pittsburgh (PIT)
Effective 2026-03-14 through 2026-03-28
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
Sun
-
Duration: 1:08, non-stop
Canadair CRJ 550 (CR5)
Direct Flights:
United Airlines UA4459
18:49
Detroit (DTW) E

20:38
Newark Liberty, New York (EWR) C
Effective 2026-02-15 through 2026-03-01
Mon
-
Tue
-
Wed
-
Thu
-
Fri
-
Sat
-
Sun
Duration: 1:49, non-stop
Canadair CRJ 550 (CR5)
This flight number is listed as serving the following routes:
  • Detroit (DTW) - Newark Liberty, New York (EWR)
  • Madison (MSN) - Chicago O'Hare (ORD)
  • Newark Liberty, New York (EWR) - Buffalo (BUF)
  • Ottawa Macdonald-Cartier (YOW) - Washington Dulles (IAD)
  • Washington Dulles (IAD) - Pittsburgh (PIT)
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